Portable computer and method for mounting a flat panel display device thereon

ABSTRACT

A portable computer including a housing having first and second sections, the first section having an information input device and the second section having a case having a first fastening element; a display panel including a second fastening element at a rear surface of the panel, the case and the display panel being attached through the first and second fastening elements; a hinge coupling the first and the second sections to each other; and a display panel support member having a third fastening element, the display panel support member being attached to the display panel through the third fastening element.

This application is a Continuation of prior application Ser. No.10/787,933, filed Feb. 27, 2004; which is a divisional of priorapplication Ser. No. 10/294,548, filed Nov. 15, 2002 now abandoned whichis a continuation of application Ser. No. 09/285,338 filed Apr. 2, 1999,now U.S. Pat. No. 6,501,641, all of which are hereby incorporated byreference as if fully set forth herein.

This application claims the benefit of Korean Patent Application Nos.98-44475, filed on Oct. 23, 1998 and 98-44973, filed on Oct. 27, 1998,which are hereby incorporated by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a flat panel display device,and more specifically, to a flat panel display device mounting structureand a method of mounting the flat panel display device to a computer.

2. Description of the Related Art

Flat panel display devices include liquid crystal display devices (LCD)which are being used widely, plasma display panels (PDP), and fieldemission displays (FED) which have been studied recently and may beapplied to computers in the near future. For convenience of explanation,the present invention will be discussed with respect to the LCD as anexample of the flat screen type display devices and a portable computermounted with the LCD.

Referring to FIG. 1, a general portable computer such as a laptop ornotebook computer typically includes a body 100, a flat panel displaydevice assembly 110 coupled to the body 100 via a hinge mechanism 124.The flat panel type display device assembly 110 has a flat panel displaydevice 111 and a display case 122 supporting the flat panel displaydevice 111. The body 100 has an input device 102 such as a keyboard. Asa flat panel type display device 111, the LCD is widely used in portablecomputers and flat screen monitors.

Referring to FIG. 2 which shows conventional assembly structure of theLCD device applied to a conventional portable computer, the display case122 has a rear case 123 and a front case or frame 121 for mounting theLCD device 130. The rear case or frame 123 has an outer surface and aninner surface and connecting ribs 123 a are formed at the comers.

The LCD device 130 has an LCD panel 132, a backlight device 134 fixed tothe back of the LCD panel 132, and a supporting frame 136 for assemblingthe LCD panel 132 and the backlight device 134 along the edge.

At the corners of the supporting frame 136, corresponding to thepositions of the ribs 123 a of the rear case 123, a plurality ofprotrusions 136 a having holes are formed.

For mounting the LCD device 130 to the display case 122, the LCD device130 is placed on the rear case 123 and the holes of the supporting frame136 and the ribs 123 a are fastened together preferably by screws 138.The front case 121 is coupled to the rear case 123.

Hereinafter, the way in which the LCD device is mounted to the case fromthe front toward the rear direction is defined as the front mountingmethod, and the assembled structure of the LCD device and the caseformed through the front mounting method is defined as the frontmounting structure.

In the front mounting structure of the LCD device, since the protrusions136 a require additional space corresponding to the protruded width d,the display area of the LCD device is reduced in comparison to the fixedsize of the display case 122.

The front mounting structure may also include an additional feature tofurther support the LCD device, as shown in FIGS. 3A and 3B.

Referring to FIGS. 3A and 3B, a conventional LCD device assembly 110includes an LCD panel 112 and a backlight device (not shown) for the LCDpanel 112, and display case 122 supporting the LCD device 111. The LCDpanel 112 and the backlight device are assembled by a supporting frame114 along the edges.

The display case 122 is coupled to a body 120 via a hinge mechanism 124,which may extend from the body 120. The display case 122 and the hingemechanism 124 are assembled through a hinge arm 126, allowing the flatpanel display device assembly 110 to pivotally move with respect to thebody 120.

Two opposite sides of the supporting frame 114 include flanges 114 a forassembling the LCD device 111 to the display case 122, and cornersinclude flanges 114 b for assembling the LCD device 111 to the hinge arm126. Hereinafter, the former is referred as a fixing flange and thelatter is referred as a mounting flange in this specification fordistinction purposes. As shown in FIG. 3B, the fixing flanges 114 a havea protruding width d2 and the mounting flanges 114 b have a protrudingwidth d1. A screw hole is formed in each of the flanges 114 a and 114 b.On the inner surface of the display case 122, ribs 122 a are formedcorresponding to the holes of the fixing flange 114 a.

To mount the LCD device 111, the hinge arm 126 and the mounting flanges114 b are screwed together, and the fixing flanges 114 a and the ribs122 a are screwed together by bolts 128.

In the mounting structure shown in FIG. 3B, the supporting frame 114requires side spaces for the flanges 114 a and 114 b. Therefore, theside space D (d1+d2) results in a reduction of the display area of theLCD panel 112 relative to the display case 122. Moreover, as the displaysize increases, the display case becomes undesirably large, especiallyfor a portable computer such as a laptop computer.

To solve the above problem and to provide a large display area withminimal display case size, a new mounting structure is needed for theLCD device.

SUMMARY OF THE INVENTION

Accordingly, the present invention is directed to a portable computerand method for mounting a flat panel display device thereon thatsubstantially obviates one or more of the problems due to limitationsand disadvantages of the related art.

An object of the present invention is to minimize the non-display areaof the LCD device.

Another object of the present invention is to provide a computer havinga flat panel display device with a maximum display area and a minimaldisplay case size.

Additional features and advantages of the invention will be set forth inthe description which follows, and in part will be apparent from thedescription, or may be learned by practice of the invention. Theobjectives and other advantages of the invention will be realized andattained by the structure particularly pointed out in the writtendescription and claims hereof as well as the appended drawings.

To achieve these and other advantages and in accordance with the purposeof the present invention, as embodied and broadly described, a portablecomputer includes a body having an information input device; a casecoupled to the body and having inner and outer surfaces; and a flatpanel display device having a display surface and a rear surface, therear surface being fixed to the inner surface of the case.

According to another aspect of the present invention, a portablecomputer includes a body having an information input device; a flatpanel display case coupled to the body; a flat panel display devicehaving a display surface and a rear surface; and a hinge mechanismhaving a hinge mount and a hinge arm fixed to the rear surface of thedisplay device.

According to another aspect of the present invention, a method ofmounting a flat panel display device to a hinge mechanism having a hingemount, a hinge arm, and a pin portion rotating in the hinge mount, theflat panel display device having a display surface and a rear surface,the method including a step of fixing the rear surface of the flat paneldisplay device to the hinge arm. The fixing step is preferably carriedout by attaching the hinge arm and the rear surface of the flat displaydevice using a screw.

According to a further aspect of the present invention, an LCD devicecoupled to an outer case includes an LCD panel having a display surfaceand a rear surface; a backlight device having a first surface facing therear surface of the LCD panel and a second surface attached to the outercase; and a supporting frame for assembling the LCD panel and thebacklight device.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary and explanatory and areintended to provide further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of this specification, illustrate embodiments of the invention andtogether with the description serve to explain the principles of theinvention.

In the drawings:

FIG. 1 is a perspective view showing a general portable computer;

FIG. 2 shows a conventional mounting structure of the LCD device for aportable computer;

FIGS. 3A and 3B are a perspective view and a front view, respectively,showing a mounting structure of the LCD device for a portable computer;

FIGS. 4A-4C show the LCD device according to a first embodiment of thepresent invention;

FIG. 5 shows a mounting structure in accordance with a first embodimentin accordance with the present invention;

FIG. 6 shows a mounting structure in accordance with a second embodimentin accordance with the present invention;

FIG. 7 is a partial sectional view showing the assembled state of thestructure in FIG. 6;

FIG. 8 is a perspective view showing a back mounting structure of theLCD device according to a third embodiment in accordance with thepresent invention;

FIG. 9 is a perspective view showing a back mounting structure of theLCD device according to a fourth embodiment in accordance with thepresent invention;

FIG. 10 is a front view showing the structure of FIG. 9;

FIG. 11 is a fifth embodiment in accordance with the present inventionwhich is an alternate embodiment to FIG. 10 where the hinge mount isfixed to the display case;

FIGS. 12, 13, and 14 are sixth, seventh, and eighth embodiments inaccordance with the present invention;

FIG. 15 is a side view showing a back mounting structure of the LCDdevice according to a ninth embodiment of the present invention; and

FIG. 16 is a partial sectional view showing the assembled state of thestructure in FIG. 15.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Reference will now be made in detail to the preferred embodiments of thepresent invention, an example of which is illustrated in theaccompanying drawings.

The present invention provides a back mounting method and a backmounting structure for a panel display device in a portable computer.Moreover, the rear surface of the display panel device may be coupled toa hinge arm for further support of the display panel device.

FIGS. 4A-4C show a first embodiment of the present invention. Referringto FIGS. 4A and 4B, the LCD device 10 has an LCD panel 12, a backlightunit 14, and a supporting frame 16. FIG. 4C shows an example of adetailed structure of the LCD device 10 shown in FIGS. 4A and 4B.Referring to FIG. 4C, the LCD device 10 has a first frame 14 g,preferably made of plastic, a reflector 14 f on the frame 14 g, a lightguide film 14 e, a diffuser or protecting film 14 d, a first prism sheet14 c, a second prism sheet 14 b, another diffuser or protecting film 14a, and the LCD panel 12. The first frame 14 g is coupled to a secondframe or supporting frame 16. At each corner of the first frame 14 g ascrew hole 15 is preferably formed. Although FIG. 4C shows the firstframe 14 g as part of the backlight unit 14, the first frame 14 g canact as the supporting frame 16.

To mount the LCD device 10 to the display case, 30 (FIG. 8) the LCDdevice 10 is placed on the inner surface of the display case 30. Then,the display case 30 and the LCD device 10 are attached to one another bybolts 18 (which may be referred to as fastening elements, fasteningparts, or a similar conveniently descriptive term) into the screw hole15 (which may be referred to as a fastening hole or a similarconveniently descriptive term, and which together with the materialdefining the hole may be referred to as a fastening element or fasteningpart) from the back of the display case 30.

As explained above, the structure shown in FIGS. 4A-4C has an advantagein that the side space such as width d2 for fixing flange 114 a of FIG.3B is not needed and the size ratio between the display area and thedisplay case is improved.

FIG. 5 shows the assembly of the LCD device 10 to the display case 21 ofthe portable computer according to a first embodiment of the presentinvention. The computer includes a body 20 or first section having aninformation input device and a second section including the case 21. Thecase 21 may cover the body 20 and is coupled to the body through a hingemechanism. Together, the case 21 and the body 20 may be referred to as ahousing, or a similar conveniently descriptive term. Preferably at eachcorner of the case 21 a through-hole 21 a (which may be referred to as afastening hole or a similar conveniently descriptive term, and whichtogether with the material defining the hole may be referred to as afastening element or fastening part) is formed.

To mount the LCD device 10 to the case 21, the LCD device 10 is placedon the inner surface of the case 21 such that the positions of the holes21 a and the holes 15 coincide with each other, and screws 18 (fasteningelements or fastening parts) are inserted into the holes 21 a and 15(which may be referred to as fastening holes or a similar convenientlydescriptive term, and which together with the material defining theholes each may be referred to as a fastening element or fastening part)from the back of the case 21. The through-hole 21 a is preferably astepped hole so that the head of the screw 18 will not protrude from theouter surface of the case 21.

Although not shown in FIG. 5 a front case such as shown in FIG. 2 ispreferably assembled with the display case 21 for covering the edges ofthe LCD device 10.

FIG. 6 shows a back mounting structure of the LCD device according to asecond embodiment of the present invention, and FIG. 7 is a detailedpartial sectional view showing the assembled state of the LCD device 10and the case 21 in accordance with the second embodiment.

At the rear surface of the backlight device 14 of the LCD device 10,fasteners 17 (fastening elements or fastening parts) such as hooks madeof plastic are formed, and the case 21 has corresponding ribs 23 (alsofastening elements or fastening parts). Preferably, the ribs 23 do notprotrude over the width of the supporting frame 16. A rib 23 has astepped hole 21 b. The fastener 17 is supported and latched by thestepped portion of the hole 21 b. To facilitate the disassembly orrelease of the fastener 17 from the hole 21 b, the hole is preferably athrough-hole extending all the way to the outer surface of the case 21.The hole 21 b may be covered by a cover 21 c.

The fastener 17 has a compressible head which compresses into a smalldiameter to allow the fastener to enter and slide through the hole 21 b.Once the head reaches the stepped portion, the head returns to itsoriginal diameter and snaps or latches onto the stepped portion of therib 23. In order to dissemble or release the LCD device 10 from the case21, a pair of tweezers or similar tool can be adapted for compressingthe head of the fastener 17 from the back of the case 21 through thehole 21 b. The fastener 17 is unlatched and can freely slide out of thehole 21 b. As an alternative embodiment, the fastener 17 can be formedon the case 21 and the stepped hole can be formed at the rear face ofthe LCD device 10 to achieve similar results.

FIG. 8 is a perspective view showing a mounting structure of the LCDdevice according to a third embodiment of the present invention. Theremay be one or more hinge mechanisms for the LCD device; however, forconvenience of explanation, only one hinge mechanism will be explained.

Referring to FIG. 8, a body 20 includes a hinge mount 22, where a hingearm 24 is connected. The hinge arm 24 has a pin portion 24 a and a flator extended portion 24 b. The former is for being mounted to the hingemount 22, and the latter is for being coupled to the rear surface of theLCD device 10. The various hinge components may be separate pieces ofattached members or a single structure.

The flat portion 24 b can be elongated in various directions and byvarious methods. FIG. 8 shows one example of the flat portion 24 b whichis in the shape of an inverted “F” having a first support memberextending in one direction and a second support member extending in asecond direction substantially perpendicular to the first direction. Ateach end of the flat portion 24 b, a hole such as a through-hole 24 c(which may be referred to as a fastening hole or a similar convenientlydescriptive term, and which together with the material defining the holemay be referred to as a fastening element or fastening part) ispreferably formed. At the back surface of the LCD device 10, pegs 15 ahaving mounting holes formed therein are formed corresponding to thepositions of the through-holes 24 c. The pegs 15 a together with themounting holes formed therein may be referred to as a fastening elementor fastening part and as shown in FIG. 8 protrude away from the LCDdevice 10. The through-holes 24 c are preferably screw holes. In thedisplay case 30, a hole such as a through-hole 30 (which may be referredto as a fastening hole or a similar conveniently descriptive term, andwhich together with the material defining the hole may be referred to asa fastening element or fastening part) may be formed. Moreover, althoughhole 30 a maybe formed at the corresponding position of the through-hole24 c of the flat portion 24 b, alternatively, the flat portion may be inan inverted “L” shape.

To mount the LCD device 10, the body 20 (first portion) and the displaycase 30 (second portion) (collectively referred to as a housing) areconnected by the pin portion 24 a on the hinge mount 22. The displaycase 30, the hinge arm 24 (referred to as a display device supportmember), and the LCD device 10 are preferably attached together byscrews 18 (fastening elements or fastening parts) through the mountinghole of the pegs 15 a and the screw hole 24 c. Alternatively, nails orother similar known fastening elements or fastening parts can be adoptedfor this purpose.

Referring to FIGS. 9 and 10 which show a fourth embodiment of the hingearm 24, the flat portion 24 b of the hinge arm 24 is extended upwardsand preferably extended to almost the entire height of the LCD device10. In the flat portion 24 b according to this embodiment, it ispreferable to form a mounting hole 24 c and the through-hole 30 a at thesame position. It is also possible to form the holes 24 c and 30 a atdifferent positions relative to the display case. Thus, additionalmounting hole 15 a may not be necessary for this embodiment. Themounting structure of this embodiment may be stronger than that of thesecond embodiment. The LCD device 10, the elongated hinge arm 24, andthe display case 30 are fastened together by screws 18, for example.

FIG. 11 shows a fifth embodiment of the present invention, where thehinge mount 22 is preferably fixed to the display case 30, but a fixedflange 26 is secured to the body 20. The structure of the hinge arm 24and other elements are similar to those shown in FIGS. 9 and 10.

FIGS. 12-14 show three alternative embodiments of the embodiments shownin FIGS. 9 and 11. In FIG. 12, the sixth embodiment of the presentinvention, the hinge arm 24 has a shape of the letter “E.” In FIG. 13,the seventh embodiment of the present invention, the hinge arm 24 hasthe shape of the letter “C.” In FIG. 14, the eighth embodiment of thepresent invention, the hinge arm 24 has the shape of the letter “H.” Thefastening holes may be formed at various positions on the hinge arm 24as desired to secure the hinge arm to the display case 30. Combinationsand other variations of these different embodiments are contemplated inthe present invention with the purpose of supporting the LCD panel,preferably through the back of the LCD panel and the case. For example,the seventh and eighth embodiments may be combined to provide a strongersupport of the LCD panel. Moreover, the hinge mount may be fixed to thebody 20 (FIG. 10) or the display case 30 (FIG. 11) in these embodiments.

The present invention contemplates the use of fastening devices otherthan screws. One such alternative embodiment is shown in FIGS. 15 and16.

FIGS. 15 and 16 show the mounting structure according to a ninthembodiment of the present invention. At the rear surface of the LCDdevice 10, at least one (fastening element or fastening part) such as ahook 19, preferably made of plastic or other suitable material, isformed. As can be seen from FIGS. 15 and 16, the hook 19 protrudes awayfrom the LCD device 10 and includes a first part and a second part wherethe first part is larger than the second part. In the flat portion 24 bof the hinge arm 24 (referred to as a display device support member), atleast one corresponding through-hole (which may be referred to as afastening hole or a similar conveniently descriptive term, and whichtogether with the material defining the hole may be referred to as afastening element or fastening part) is formed. In the display case, atleast one stepped hole 30 b (which may be referred to as a fasteninghole or a similar conveniently descriptive term, and which together withthe material defining the hole may be referred to as a fastening elementor fastening part) corresponding to the through-hole in the hinge arm 24is formed to support and/or latch the fastener 19. To facilitate thedisassembly or release of the fastener 19 from the hole 30 b through therear of the case 30, the hole 30 b is preferably a through-hole.

To assemble the LCD device to the hinge arm 24 and display case 30, thehinge arm 24 is mounted to the, hinge mount 22 (as shown in FIGS. 10 and11) and the through-hole 24 c (see FIGS. 12-14) of the hinge arm 24 andthe hole 30 b (see FIGS. 15-16) are coincidentally placed. Then, the LCDdevice 10 with at least one fastener 19 is pressed into the hole 30 band latched onto the display case 30, as shown in detail in FIG. 16.Here, the fastener 19 will slide through the hole 30 b and snap intoplace by the protruding or wing portions of the head of the fastener 19.To dissemble the LCD device 10 from the display case 30, a device suchas tweezers or other suitable tool can be adapted for squeezing the heador top portion of the fastener 19 from the back of the case 30 throughthe hole 30 b. The fastener 19 is unlatched and can freely slide out ofthe hole 30 b. The hole 30 b can be covered by a cover 30 c.

Alternatively, the fastener 19 can be formed on the case 30 and thestepped hole can be formed at the rear face of the LCD device 10 toachieve similar results.

As explained above, the mounting method according to the presentinvention does not require unnecessary side space for mounting the LCDdevice on the computer. Thus, the ratio of the display area of the LCDdevice to the display case can be improved and maximized.

In the above embodiments of the present invention, although the LCDdevice has been used as one type of flat panel display device, otherflat panel display devices such as plasma display panels (PDP) and fieldemission displays (FED) may be used in accordance with the presentinvention. Moreover, in the above embodiments, other hinge mechanismsmay be used such as a gear hinge as disclosed, for example, in U.S.application Ser. No. 08/937,801 filed on Sep. 25, 1997 entitled,“DISPLAY WITH GEAR TYPE HINGE,” which is incorporated herein byreference.

It will be apparent to those skilled in the art that variousmodifications and variation can be made in the portable computer andmethod for mounting a flat panel display device thereon of the presentinvention without departing from the spirit or scope of the invention.Thus, it is intended that the present invention cover the modificationsand variations of this invention provided they come within the scope ofthe appended claims and their equivalents.

What is claimed is:
 1. A flat display panel device mounted to a housingcomprising a front housing part and a rear housing part having a firstfastening part, the flat display panel device not being fixed to thefront housing part, the flat display panel device comprising: a firstframe having a second fastening part at a rear surface of the firstframe; a flat display panel; a second frame; and a hinge arm between thefirst frame and the housing, the supporting member having a thirdfastening part, wherein the flat display panel is between the firstframe and the second frame, the first frame is fixed to the housingthrough the first, second and third fastening parts, and wherein atleast one of the first, second and third fastening parts is behind theflat display panel wherein the flat display panel conceals the at leastone of the first and second fastening part in a viewing direction. 2.The flat display panel device according to claim 1, wherein the secondfastening part includes a fastening hole.
 3. The flat display paneldevice according to claim 2, wherein the second fastening part includesa fastening hole at each of two corners of the first frame.
 4. The flatdisplay panel device according to claim 2, wherein the second fasteningpart includes four fastening holes each at a respective corner of thefirst frame.
 5. The flat display panel device according to claim 1,further comprising: a backlight unit; a reflector unit adjacent thefirst frame; a light source unit adjacent the reflector unit; and alight guide unit adjacent the light source unit.
 6. The flat displaypanel device according to claim 5, further comprising a diffuser unitand a prism unit.
 7. The flat display panel device according to claim 1,wherein the flat display panel device only shows the flat display paneland the second frame when viewed from the viewing direction of thedisplay.
 8. The flat display panel device according to claim 1, whereinthe fastening part includes a protruding portion protruding away fromthe flat display panel.
 9. The flat display panel device according toclaim 8, wherein the protruding portion includes a peg having afastening hole.
 10. The flat display panel device according to claim 8,wherein the protruding portion includes a first part and a second part,the first part being larger than the second part.
 11. A flat displaypanel device comprising: a first frame having at least one firstfastening part at a rear surface of the first frame; a second frame; aflat display panel between the first and second frames; and a hinge armon the rear surface of the first frame, the hinge arm having at leastone second fastening part, wherein the at least one first fastening partis behind the flat display panel, wherein the flat display panelconceals the at least one first fastening part in a viewing direction;wherein the first frame is fixed to a housing having a front housingpart and a rear housing part with the at least one first fastening partat the rear surface of the first frame, the at least one secondfastening part and at least one third fastening part at the rear housingpart; and wherein the flat display panel device is not fixed to thefront housing part.
 12. The flat display panel device according to claim11, wherein the at least one first fastening part passes through therear surface of the first frame.
 13. The flat display panel deviceaccording to claim 12, wherein the at least one first fastening partcomprises: a fastening hole; and a screw wherein the screw passesthrough the fastening hole and through the rear surface of the firstframe.
 14. A flat display panel device comprising: a first frame havingat least one first fastening part at a rear surface of the first frame;a second frame; a flat display panel between the first and secondframes; and a hinge arm on the rear surface of the first frame, thehinge arm having at least one second fastening part, wherein the atleast one first fastening part is behind the flat display panel and thefirst frame is fixed to a rear portion of a housing with the at leastone first fastening part at the rear surface of the first frame, the atleast one second fastening part and at least one third fastening part atthe rear housing and wherein the at least one first fastening partpasses through the rear surface of the first frame and wherein the flatdisplay panel conceals the at least one first fastening part in aviewing direction.
 15. The flat display panel device according to claim14, wherein the at least one first fastening part comprises: a fasteninghole; and a screw wherein the screw passes through the fastening holeand through the rear surface of the first frame.